GB1483389A - Power amplifier capable of operating class a and class ab - Google Patents

Power amplifier capable of operating class a and class ab

Info

Publication number
GB1483389A
GB1483389A GB55573/74A GB5557374A GB1483389A GB 1483389 A GB1483389 A GB 1483389A GB 55573/74 A GB55573/74 A GB 55573/74A GB 5557374 A GB5557374 A GB 5557374A GB 1483389 A GB1483389 A GB 1483389A
Authority
GB
United Kingdom
Prior art keywords
class
transistors
transistor
current
resistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB55573/74A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of GB1483389A publication Critical patent/GB1483389A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3069—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output
    • H03F3/3071—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with asymmetrical driving of the end stage
    • H03F3/3072—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with asymmetrical driving of the end stage using Darlington transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/213—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only in integrated circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3069—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output
    • H03F3/3071—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with asymmetrical driving of the end stage

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Amplifiers (AREA)
GB55573/74A 1973-12-26 1974-12-23 Power amplifier capable of operating class a and class ab Expired GB1483389A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US428519A US3896393A (en) 1973-12-26 1973-12-26 Monolithic power amplifier capable of operating class a and class ab

Publications (1)

Publication Number Publication Date
GB1483389A true GB1483389A (en) 1977-08-17

Family

ID=23699226

Family Applications (1)

Application Number Title Priority Date Filing Date
GB55573/74A Expired GB1483389A (en) 1973-12-26 1974-12-23 Power amplifier capable of operating class a and class ab

Country Status (5)

Country Link
US (1) US3896393A (enrdf_load_stackoverflow)
JP (1) JPS5412378B2 (enrdf_load_stackoverflow)
DE (1) DE2461163C3 (enrdf_load_stackoverflow)
FR (1) FR2256585B1 (enrdf_load_stackoverflow)
GB (1) GB1483389A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269716A (en) * 1992-08-03 1994-02-16 Texas Instruments Ltd Bias circuit for changing class of part of multistage amplifier
CN111175561A (zh) * 2019-12-30 2020-05-19 漳州科华技术有限责任公司 一种双电源电压检测电路及系统

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021701A (en) * 1975-12-08 1977-05-03 Motorola, Inc. Transistor protection circuit
JPS5832801B2 (ja) * 1976-02-10 1983-07-15 ヤマハ株式会社 電力増幅器
GB1580245A (en) * 1977-09-26 1980-11-26 Philips Electronic Associated Signal buffer circuit arrangement
JPS6038043B2 (ja) * 1978-09-27 1985-08-29 パイオニア株式会社 スイツチ回路
US4232273A (en) * 1979-01-29 1980-11-04 Rca Corporation PNP Output short circuit protection
NL7903663A (nl) * 1979-05-10 1980-11-12 Philips Nv Versterker voor toepassing in een lijncircuit.
NL8004675A (nl) * 1980-08-19 1982-03-16 Philips Nv Signaalbufferschakeling in een geintegreerde schakeling voor het leveren van een uitgangssignaal aan een aansluitklem.
EP0120125A1 (en) * 1983-11-21 1984-10-03 Motorola, Inc. Bias circuit which is independent of output device voltage characteristics for biassing an amplifier in class AB operation
FR2741212B1 (fr) * 1995-11-14 1998-01-30 Sgs Thomson Microelectronics Dispositif de limitation du courant de sortie d'un amplificateur operationnel
FR2836306B1 (fr) * 2002-02-15 2004-07-16 St Microelectronics Sa Transconducteur a-ab
DE10231156B4 (de) * 2002-07-10 2008-10-30 Infineon Technologies Ag Schaltung zum Liefern einer Basis-Betriebsspannung für einen Bipolartransistor und Verstärkerschaltung
CA2616444C (en) * 2005-07-28 2014-07-15 Schlumberger Canada Limited High temperature wellbore monitoring method and apparatus
US8120424B2 (en) * 2010-06-15 2012-02-21 Intersil Americas Inc. Class AB output stages and amplifiers including class AB output stages
CN105591590B (zh) * 2015-10-26 2023-02-21 施少俊 换导式二相交流变频马达驱动电路

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK106043C (da) * 1964-08-22 1966-12-12 Philips Ind Handel As Kredsløb til stabilisering af arbejdspunktet for flere transistorer over for variationer i temperatur og fødespænding ved hjælp af et temperaturafhængigt element.
US3445776A (en) * 1966-12-19 1969-05-20 Rca Corp Phase splitting circuit for a direct coupled push-pull amplifier
US3611170A (en) * 1969-10-27 1971-10-05 Rca Corp Bias networks for class b operation of an amplifier
US3670253A (en) * 1970-06-18 1972-06-13 Arthur L Newcomb Jr A.c. power amplifier
US3675142A (en) * 1971-03-05 1972-07-04 Electrohome Ltd Transistor power amplifier with dc output voltage stabilization
US3739292A (en) * 1972-06-29 1973-06-12 Nippon Electric Co Amplifier circuit using complementary symmetry transistors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269716A (en) * 1992-08-03 1994-02-16 Texas Instruments Ltd Bias circuit for changing class of part of multistage amplifier
CN111175561A (zh) * 2019-12-30 2020-05-19 漳州科华技术有限责任公司 一种双电源电压检测电路及系统
CN111175561B (zh) * 2019-12-30 2022-07-05 漳州科华电气技术有限公司 一种双电源电压检测电路及系统

Also Published As

Publication number Publication date
FR2256585B1 (enrdf_load_stackoverflow) 1979-01-05
DE2461163A1 (de) 1975-07-17
FR2256585A1 (enrdf_load_stackoverflow) 1975-07-25
DE2461163C3 (de) 1981-05-21
US3896393A (en) 1975-07-22
DE2461163B2 (de) 1980-07-24
JPS5098760A (enrdf_load_stackoverflow) 1975-08-06
JPS5412378B2 (enrdf_load_stackoverflow) 1979-05-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee